Slate and Phonolite Types and Facts
Types
Phyllite, Schist, and Slate
Kenyte
Features
Easily splits into thin plates, Surfaces are often shiny, Very fine grained rock
Application of acids on the surface causes cloudy frosting, Available in Lots of Colors and Patterns, Dissolves in hydrochloric acid, Is one of the oldest rock
Archaeological Significance
Types of Slate and Phonolite
Some rocks according to their use or texture are classified into different types. Know more about Slate Texture and Phonolite Texture. Types of Slate are Phyllite, Schist, and Slate whereas the types of Phonolite are Kenyte.During historic times, some rocks depending on their hardness were used to create Pictographs and Petroglyphs. Rocks which are hard were generally not used. Pictographs are paintings or drawings that have been placed or created on the surface of rock. Slate and Phonolite were for creating pictographs. Petroglyph is an image which is carved into a rock. These are images created by removing part of a rock surface by incising, picking, carving or abrading, as a form of rock art. Slate and Phonolite were for creating petroglyphs.